Bel Canto 3.0 vs 2.7 DACs


I have a Bel Canto 3.0 now. Been considering getting a 2.7. Anyone here ever compared the two. Or had them in your system? Just curious as to what you think. Is the 2.7 much better? Or is it marginal? 
pstores
I think going to one of their Virtual Battery Supply models would make a bigger difference.  I compared the 3.0 to 3.0VBS and the improvement provided by the VBS was not small. 
I haven't done a side by side, but their latest DAC2.7 is supposed to eclipse their previous DAC3.7 which came with the VBL1.
I have the 3.5 w VBS. Upgraded from 3.3.  I would be interested in hearing the 2.7 as well, I find the 3.5 to be a too “intense” and a bit harsh. I’m currently using my Cary 306 SACD as a DAC and find it far more musical, less fatiguing and more resolving. Unfortunately the Cary is far from reliable and I’m looking for a better overall solution.